My civic was working properly but after service in Honda center started to make more heat and after some time not starting when hot , battery is new and sent to test the test was OK.
when cold will start immediately

 

Check main relay for solder cracks. Resolder or replace with new unit. Google main relay if you dont know what it is.

 

Mine was a loose connection to starter.

 

PGMFI relay. Pick one (or a few) from the salvage yard

 

bad etc sensor can do this.
test it on the car to avoid coolant system bleeding nightmares.
see:

https://mechanics.stackexchange.com/...start-when-hot